<html>
<pre class="textdiagram" id="fig22">
+------------+
|            |
|   Step 1   |
|            |
+------------+
|    PAIR    |
\-----+------/
      |
      |
    Ready!
      |
      v
/------------\
|    PAIR    |
+------------+
|            |
|   Step 2   |
|            |
+------------+
|    PAIR    |
\-----+------/
      |
      |
    Ready!
      |
      v
/------------\
|    PAIR    |
+------------+
|            |
|   Step 3   |
|            |
+------------+
</pre>
</html>
